//
//  UIButton+ImageTitleLayout.m
//  YunWeiGu
//
//  Created by yuchanglin on 16/3/31.
//  Copyright © 2016年 WeiGu. All rights reserved.
//

#import "UIButton+ImageTitleLayout.h"

@implementation UIButton (ImageTitleLayout)

/**
 *  自定义button
 *
 *  @param style 图片和文字的类型
 *  @param space 图片和文字的间隔大小
 */
- (void)layoutButtonWithEdgeInsetsStyle:(MYButtonEdgeInsetsStyle)style
                imageTitleLayoutSpacing:(CGFloat)space

{
          // 1. 得到imageView和titleLabel的宽、高
    
          CGFloat imageWith = self.imageView.frame.size.width;
          CGFloat imageHeight = self.imageView.frame.size.height;
    
          CGFloat labelWidth = 0.0;
          CGFloat labelHeight = 0.0;


    if ([UIDevice currentDevice].systemVersion.floatValue >= 8.0) {
        
        labelWidth = self.titleLabel.intrinsicContentSize.width;
        labelHeight = self.titleLabel.intrinsicContentSize.height;
    }else{
    
        labelWidth = self.titleLabel.frame.size.width;
        labelHeight = self.titleLabel.frame.size.height;
    
    }
    
    // 2. 声明全局的imageEdgeInsets和labelEdgeInsets
    UIEdgeInsets imageEdgeInsets = UIEdgeInsetsZero;
    UIEdgeInsets labelEdgeInsets = UIEdgeInsetsZero;
    
    // 3. 根据style和space得到imageEdgeInsets和labelEdgeInsets的值
    
    switch (style) {
        case MYButtonEdgeInsetsStyleTop:
        {
            imageEdgeInsets = UIEdgeInsetsMake(-labelHeight-space/2.0, 0, 0, -labelWidth);
            labelEdgeInsets = UIEdgeInsetsMake(0, -imageWith, -imageHeight-space/2.0, 0);
        }
            break;
        case MYButtonEdgeInsetsStyleLeft:
        {
            imageEdgeInsets = UIEdgeInsetsMake(0, -space/2.0, 0, space/2.0);
            labelEdgeInsets = UIEdgeInsetsMake(0, space/2.0, 0, -space/2.0);
        }
            break;
        case MYButtonEdgeInsetsStyleBottom:
        {
            imageEdgeInsets = UIEdgeInsetsMake(0, 0, -labelHeight-space/2.0, -labelWidth);
            labelEdgeInsets = UIEdgeInsetsMake(-imageHeight-space/2.0, -imageWith, 0, 0);
        }
            break;
        case MYButtonEdgeInsetsStyleRight:
        {
            imageEdgeInsets = UIEdgeInsetsMake(0, labelWidth+space/2.0, 0, -labelWidth-space/2.0);
            labelEdgeInsets = UIEdgeInsetsMake(0, -imageWith-space/2.0, 0, imageWith+space/2.0);
        }
            break;
        default:
            break;
    }
    
    // 4. 赋值
    self.titleEdgeInsets = labelEdgeInsets;
    self.imageEdgeInsets = imageEdgeInsets;
}

- (void)layoutButtonWithEdgeInsetsImageTitleLayoutSpacing:(CGFloat)space{
    
    // 1. 得到imageView和titleLabel的宽、高
    
    CGFloat labelWidth = 0.0;
    CGFloat labelHeight = 0.0;
    
    
    if ([UIDevice currentDevice].systemVersion.floatValue >= 8.0) {
        
        labelWidth = self.titleLabel.intrinsicContentSize.width;
        labelHeight = self.titleLabel.intrinsicContentSize.height;
    }else{
        
        labelWidth = self.titleLabel.frame.size.width;
        labelHeight = self.titleLabel.frame.size.height;
        
    }
    
    // 2. 声明全局的imageEdgeInsets和labelEdgeInsets
    UIEdgeInsets imageEdgeInsets = UIEdgeInsetsZero;
    UIEdgeInsets labelEdgeInsets = UIEdgeInsetsZero;
    
    // 3. 根据style和space得到imageEdgeInsets和labelEdgeInsets的值
    imageEdgeInsets = UIEdgeInsetsMake(0, -space/2.0, 0, space/2.0);
    labelEdgeInsets = UIEdgeInsetsMake(0, 0, 0, 0);
    // 4. 赋值
    self.titleEdgeInsets = labelEdgeInsets;
    self.imageEdgeInsets = imageEdgeInsets;
    
}
@end
